Composition of matter to be used as an oil-paint.



UNITED STATES PATENT OFFICE.

HENRY MARTIN LUDEWIG WUNNENBERG, OF KLAUSTHAL, GERMANY, ASSIGNOR TO THE FIRM 0F AROTA, GESELLSCHAFT MIT BESCHRANKTER HAFTUNG, OF HAM- BURG, GERMANY.

COMPOSITION OF MATTER TO BE USED AS AN OIL-PAINT.

No Drawing.

T 0 all whom it may concern:

Be it known that I HENRY MARTIN Loonwie IVUNNENBERG, a subject of the German Emperor, residing at Klausthal, Germany, have invented a new and useful Composition of Matter to be Used as an Oil- Paint, of which the following is a1specifi cation.

It is well known that oil color coatings adhere very indiiferently to cement plaster unless the latter is thoroughly dry and set.

In accordance with the present invention covering coatings can be obtained which are readily received by and adhere firmly to plaster even when freshly mixed. Those coatings are obtained by mixing a vehicle as oil or varnish with very finely ground silver dross and cement and utilizing this mixture, with or without the addition of coloring materials as a covering coat. Silver dross is a slag resulting from the cupellation of silver and lead in the silver refining process and is constituted by metal silicates of which the furnace consists after its original materials (silicates) of aluminium, magnesium and the like have absorbed the foreign metallic substances usually associated with silver such for instance as lead, zinc, and copper. This substance which contains lead and zinc in combination with silicic acid is distinguished by its power of absorbing varnish and has already been employed mixed with varnish as a coating for preventing rust; this mixture does not, however, adhere to freshly mixed cement plas- Specification of Letters Patent.

Patented Mar. 25, 1913.

Application filed December 16, 1911. Serial No. 666,252.

ter, nor does cement alone ground with a vehicle as oil or varnish; it is only by the admixture of both the said materials to the vehicle oil or varnish, that the desired result is obtained.

Suitable compositions may be formed by proportioning the materials as follows:

I. 125 parts in weight silver dross,

62.5 Portland cement, 25 ocher.

. To 100 parts of this mixture are added parts linseed-oil-varnish.

silver dross, Portland cement, ocher,

sulfate of barium.

II. 125 parts in weight 63 L C 4 12 4 H C 13 (C (6 1 &5 parts linseed-oil-varnish to 100 weights of this mixture.

III. 100 parts in weight silver dross,

Portland cement, 200 sulfid of zinc.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

